package chapter04.exercise;

import lombok.extern.slf4j.Slf4j;

import java.util.Random;

@Slf4j
public class ExerciseTransfer {
    public static void main(String[] args) throws InterruptedException {
        Account a=new Account(1000);
        Account b=new Account(1000);
        Thread t1 = new Thread(() -> {
            for (int i=1;i<1000;i++){
                a.tranfer(b,randomAmount());
            }
        }, "t1");
        Thread t2 = new Thread(() -> {
            for (int i=1;i<1000;i++){
                b.tranfer(a,randomAmount());
            }
        }, "t2");
        t1.start();
        t2.start();
        t1.join();
        t2.join();
        log.debug("total:{}",a.getMoney()+b.getMoney());

    }
    static Random random=new Random();
    public static int randomAmount(){
        return random.nextInt(100)+1;

    }
}
class Account{
    private int money;
    public Account(int money){
        this.money=money;
    }

    public int getMoney() {
        return money;
    }

    public void setMoney(int money) {
        this.money = money;
    }

    // 转账
    public void tranfer(Account target,int amount){
        synchronized (Account.class){
            if(this.money>=amount){
                this.setMoney(this.getMoney()-amount);
                target.setMoney(target.getMoney()+amount);
            }
        }
    }
}
